Pump



Patented June 17, '51930 UNITED; Sfirilx'rias PATENT OFFICE ALBERT n. WILLI, or DETROIT, nIcHzeAN, AssIGNon. ToconTINENTAL' morons i conPoBATIoN. or DETnoIT, MICHIGAN, A conPoaATIoN orvIneINIA Appntation ned october 17,

This invention relates to pumps and refers more particularly to water pumps ordinarilyl employed'for circulating cooling water throughout the cooling systems of internal combustion engines.

` In water pumps of the above character it is customary to provide one -or more packing devices for-the pumpl shaft in order to prevent leakage of water from the pump hous' v ing.' Such packing proves unsatisfactory v since the packing becomes worn and must be claimed.

.l Referring to? the accompanying drawings intervals.

j One object of my 4invention is to provide taken' up or tightened by the usual nut, from time to time, in order to prevent leakage. It is also necessary` iILmany instances to rei new the packing within comparatively shortr Furthermore when the engine be comes heated to a fairly high` temperature the pump "shaft, packing, and associated parts expand. On cooling, the metalwpartscontract to a reater degree than the packing material giving rise. to leakage' of water past the packing.

a pum constructed to eliminate the aforesaid di culties. yA further object is toeliminate the customary packing with its diffi-v culties and to provide a pump shaft seal which `vvill not leak, and which will provide an effective seal regardless of temperature` conditions of the engine and pump parts.

Further objects of my invention reside in-l the combination and `arrangement offparts more particularly `hereinafter described and in which like reference characters indicate corresponding parts, y

Fig. 1 is a sectional elevation view showingrmy invention,

, ig.2 is a detail section view through 2 2 of Fig. 1, and Fig. 3 is aV detail enlarged section view through 3--3 o'f Fig.' 1. y

In-the drawings reference character A represents the usual water 'acket of an internal combustion engine, it ing customary in one type of pump installation to mount the' water pump within 'such a .Water jacket. Illustratingmy invention in such a combination, I may conveniently drive my pump PUMP 1927. serial No. 226,610.

from a drive shaft 10 which may carry the usual fa`n (not shown) at the frnt end of l the shaft. -12 isa pulley .driven by the usual belt operating from a driving pulley usually spaced bearingsl, 14, the former-taking the t rust from the fan and pump as will presentlybe apparent. The bearing' 14 carries a bushing 15 engageable with the shaft `10 and if desired the usual 4oiler 16 may be pro vided' for supplying lubricant to the bushing 15 `and 'shaft 10 through lubricant as.

4sage 17l as will be readily understood. he p o iler 16 and `bearing 14: may be formed' with a water jacket cover 1 8?.y completing the pump housing. v 'The Lshaft' 10 is formed withz-oneor more lsplines or grooves 19, receiving jthe projecannular member formed with a hub 23 also provided with projections 24 engageable in Y splines 19. The annularmember 22 and Aimpeller 21 ,are formed with cooperating faces receiving herebetween a sealing gasket 25,

screws 26 serving to hold the member 22 in p tions 20 of the pumpimpeller 21. 2 2 is an ceiving aspring 28`one'end-of which is an' choredgto the shaft 10 and the other end acting lon the' impeller 21. One convenient means for anchoringlthe spring ma'y comy prise a split abutment ring 29.Which'1n as the annular groove 30 formed -in shaft'lO. Thus the spring 28- bears, against ithe ring 29 which 'servesp to anchor .the spring. The spring at its other end acts against thev impeller 21 forcing the faces 31, 32 of the bushig 15 and impeller'21 respectively relatlvel against each other. The bushing 151s pre erablyl pressed in the bearing 14 and Isthus l31, 32 are a'ccura ely machined so as' to 'provide a. water tig t running fit. A lvsmall amount of clearance is provided between ring 29 andhub 23 so that as thefaces 31, 32besembling may be snapped into position in ,J

held 1n 'a nonrotating position, and the faces come worn the spring 28 will automatically take up such wear, moving the impeller 21, and annular member 22 as a unit axially of the shaft 10 toward the bushing 15.

By reason of my pump construction the impeller 21 is driven from shaft 10 through spllnes 19 and projections 20, 24, the splines permitting the aforesaid movement of the impeller and member 22 axially of the drive shaft.

The spring 28 is sufficiently strong, to at all times, ti htly force the impeller face 32 against the ushing face 31 overcoming any thrust from the impeller, should the impeller blades be arranged tocause a thrust against the spring. Such a thrust would be entirelytaken up through the spring 28, ring 29, shaft 10, and thrust bearing 13. Should the thrust react in the opposite direction then the contact of the faces 31, 32 will be increased to advantage in maintaining a water seal therebetween. The usual or other convenientlyy formed pump inlet and outlet 33, 34 are provided.

In operation a water film will be maintained between the faces 3l, 32 serving to prevent passage of water between these faces and further serving to reduce the wear of these faces. maintain adequate pressure between faces 31,` 32' regardless of temperature conditions and as any wear takes place the spring will .automatically take up such wear by moving the impeller 21 and annular member 22 as a unit toward bushing 15. The spring pocket 27 is kept free of water by reason of the gasket 25 and the fluid seal at the'faces 31, 32. Thus I am enabled to dispense with the usual shaft st-uiin or. packing ordinarily carried at the le t (as shown in Fig. 1.) of the bushing 15. It will lbe observed that leakage between bearing 14 and bushing 15 can not occurowing to the pressed t of these parts.

water .seal vface fixed :against movement' axially o f thedrive shaftf,' v said impeller rovlded .with a water-...seal face`,`and yielding means 'forcing the said water seal; faces relatively together for' maintainingla water seal, said impeller beinggtglidably mounted j closure forthe spring lpocket and enclosing pn the drive shaft; j

The spring 28 will at all timeselement fi journalling the shaft, Aan imppller slidablyx,

2. A pump com rising a drive shaft, an impeller, means or dr1ving the im eller from the drive shaft, an element having a water seal face fixed against movement axially of the drive shaft, said im eller provided with a Water seal face, iel ing means forcing the said water seal aces relatively together for maintaining a water seal, said impeller being slidable axially of the drive shaft, and means anchorin said yielding means te the driving sha t whereby the thrust reaction is transmitted to the drive shaft.

3. A pump comprising a drive shaft, an impeller having a recessed hub, means for driving the impeller.V from the drive shaft within the recess of the impeller hub an element having a water seal face fixed against movement axially of the drive shaft, said impeller provided with a water seal face, and a spring surroundin the drive shaft and arran ed to act agalnst the impeller to force t e said water seal face of the impeller toward the water seal face of the said element.

4. A pump comprising a drive shaft, an impeller, an element surrounding the shaft and fixed axially thereof, and a spring housed by the impeller and acting on the impeller to force the impeller against the said element to maintain a water film seal between the impeller and element.

5. A pump comprising a drive shaft, an im eller driven from the drive shaft and sli able axially thereof, an annular member fixed to the impeller sealing one end of the drive shaft,- sa1d member having a sliding driven connection with the drive shaft, a sealing gasket between the im eller and the annular member, said impe ler provided with an annular spring pocket, a spring anchored to the drive shaft within the spring pocket and acting against the impeller to urge the impeller axially of the drive shaft, a bushing surrounding the drive shaft and ixed relative thereto, said bushing and impeller having cooperating bearlng faces maintained in contact by said spring for providing a Water seal.

6. A pump comprising a drive shaft, an impeller slidably mounted on the shaft and driven therefrom, a bearing element contacting with the drive shaft for journallinv' the shaft, said element being fixed wit respect to the shaft, and a sprmg acting on the impeller to force the impeller against said bearing element to maintain a water film seal between the impeller and element. f

' 7.' A 'pum comprising a drive shaftl an xe with respectto the shaft ,and

mgmted on (pgp endhof thes aft, said impe er provi ,wit a springv et a member carried by'theimpeller orlcning a the shaft end, and a spring within `said f pocket urging the impeller in Huid sealing contact f with said element.

8. A pum-p comprising a rotatable drive shaft fixed against axial movement an impeller adapted to be driven by said haft, a relatively fixed element. providing a fluid seal in cooperation with the impeller, and yielding means acting on the im eller to A urge the 4impeller axially of the drive shaft,

toward said xed element.. A

9. A pump comprising a'rotatable drive shaft fixed against axial movement, animpeller adapted to be driven by said shaft, a relatively fixed element providing a fluid v seal 'in coo ration. with the impeller, and a springanc ored at one, end thereof to the drive shaft and having its other end thereof acting on the impeller to urge the impeller y axially of the drive vshaft toward said fixed element. i

10. A ump comprising a drive shaft, an element xed with respect to the shaft and journalling the shaft, an im eller slidably mounted on one end ofthe s aft, said impeller provided with a spring pocket, a member carried by the impel er forming a closure for the spring pocket and enclosin theshaft end, and a spring within said poc et urging v the impeller in fluid sealing contact with said element, said closure member, being Y provided with a hub portion engaging the shaft end. In witness whereof, I hereunto subscribe .35 my name this l12th day of October, A. D.y

ALBERT 

